P-wave of ECG indicates:

(1) Depolarisation of atrial muscles

(2) Activation of the SA node

(3) Spread of excitation from the SA node to the V node

(4) Repolarisation of atria and depolarisation of ventricle

1 and 3 are correct.

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2 and 4 are correct.

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1 and 2 are correct.

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1, 2 and 3 are correct.

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Solution

The correct option is C
1 and 2 are correct.

The P wave is a small upward wave which represents electrical excitation or atrial depolarisation which leads to atrial contraction. The impulses of contraction start from the SA node as the P wave activates the SA node.

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Similar questions

ECG depicts the depolarisation and repolarisation process during the cardiac cycle. In the ECG of a normal healthy individual one of the following waves is not represented.
(a) Depolarisation of atria
(b) Repolarisation of atria
(c) Depolarisation of ventricles
(d) Repolarisation of ventricles

Q. Match the Column - I with Column - II.

	Column I		Column II
A	P-wave	1	Depolarisation of ventricles
B	QRS complex	2	Repolarisation of ventricles
C	T-wave	3	Coronary ischemia
D	Inversion of T-wave	4	Depolarisation of atria
		5	Repolarisation of atria

The cardiac impulse is initiated and conducted further upto ventricle. The correct sequence of conduction of impulse is
$\begin{matrix} (a) & S A N o d e & A V N o d e & P u r k i n j e f i b e r & A V B u n d l e (b) & S A N o d e & P u r k i n j e f i b e r & A V N o d e & A V B u n d l e (c) & S A N o d e & A V N o d e & A V B u n d l e & P u r k i n j e f i b e r (d) & S A N o d e & P u r k i n j e f i b e r & A V B u n d l e & A V N o d e \end{matrix}$

Q. Read the following statements and choose the correct option:
Statement 1: Atria receive blood from all parts of the body which subsequently flows to ventricles.
Statement 2: Action potential generated at sino-atrial node passes from atria to ventricles.

Q. ECG depicts the depolarisation and repolarisation processes during the cardiac cycle. In the ECG of a normal healthy individual one of the waves are not represented. Which wave is that? Explain.

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P-wave of ECG indicates: (1) Depolarisation of atrial muscles (2) Activation of the SA node (3) Spread of excitation from the SA node to the V node (4) Repolarisation of atria and depolarisation of ventricle

The correct option is C 1 and 2 are correct. The P wave is a small upward wave which represents electrical excitation or atrial depolarisation which leads to atrial contraction. The impulses of contraction start from the SA node as the P wave activates the SA node.

P-wave of ECG indicates:

(1) Depolarisation of atrial muscles

(2) Activation of the SA node

(3) Spread of excitation from the SA node to the V node

(4) Repolarisation of atria and depolarisation of ventricle

The correct option is C
1 and 2 are correct.

The P wave is a small upward wave which represents electrical excitation or atrial depolarisation which leads to atrial contraction. The impulses of contraction start from the SA node as the P wave activates the SA node.